test: add test suite for player, api and widgets

tests/test_main.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from somafm_tui.__main__ import _build_parser, _list_stations
+
+
+def test_parser_defaults_and_flags() -> None:
+    parser = _build_parser()
+    args = parser.parse_args([])
+    assert args.autoplay is None
+    assert args.offline is False
+    assert args.no_audio is False
+
+    assert args.spectrum_source == "auto"
+
+    args = parser.parse_args(
+        ["--station", "defcon", "--play", "--no-mpris", "--spectrum-source", "monitor"]
+    )
+    assert args.station == "defcon"
+    assert args.autoplay is True
+    assert args.no_mpris is True
+    assert args.spectrum_source == "monitor"
+
+
+def test_list_stations_offline(capsys) -> None:
+    assert _list_stations(offline=True) == 0
+    output = capsys.readouterr().out
+    assert "groovesalad" in output
+    assert "Groove Salad" in output